RGB vs. CMYK Color Guide

Why the Difference Matters

Your monitor creates color by mixing red, green, and blue light — the more light, the brighter and more vivid the color. A printing press does the opposite: it lays down cyan, magenta, yellow, and black ink, where more ink means darker, not brighter. These are fundamentally different processes, and RGB has a wider range of achievable colors than CMYK — meaning some especially bright or neon colors you see on screen simply can't be reproduced exactly in ink.

What This Means for Your File

If you design in RGB and send it straight to print, the file gets converted to CMYK at some point in the process — and colors can shift, sometimes noticeably, especially in bright blues, greens, and oranges. The safest approach is to set your document to CMYK color mode from the start in programs that support it (Photoshop, Illustrator, InDesign), so you're seeing a closer approximation of the final print color while you design.

When Color Accuracy Is Critical

If you need an exact color match — a specific brand blue, for example — the most reliable method is referencing a Pantone Matching System (PMS) swatch book rather than trusting what you see on any particular monitor. Monitors vary in calibration, so the same file can look slightly different from screen to screen; a PMS number gives everyone in the process the same physical reference point.

Quick Tips

• Set your document color mode to CMYK before you start designing, when possible
• Avoid relying on very bright neons or fluorescents — they rarely translate accurately to CMYK
• For exact brand colors, specify a Pantone (PMS) number rather than an RGB or hex value
• If a project is highly color-sensitive, ask about a physical proof before a full print run